Quest Engineering DEH 3000

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1-800-533-7533
Quest DEH 3000 Installation, Operation and Maintenance Instructions
4
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WARNING! THE QUEST DEH 3000 DIGITAL CONTROL OPERATES ON A LOW VOLTAGE
CIRCUIT (24 VAC) AND MUST NEVER CONTACT OR BE CONNECTED TO A HIGH VOLTAGE CIRCUIT.
WARNING! UNPLUG THE QUEST DEHUMIDIFIER BEFORE WIRING THE DEH 3000.
Theinstallermustsupplyalleldwiring,includingthewiringbetweentheQUESTdehumidierand
theQuestDEH3000.SomeofthecontrolwiresleavingtheQUESTdehumidiermaynotbeusedin
somecontrolsituationsandshouldbeleftdisconnectedwithwirenutstapedontothestrippedends.
BesuretoconsulttheelectricalschematicinthismanualortheinternalelectricalboxoftheQuest
dehumidierbeforemakinganycontrolconnections.
WARNING! ONLY CONNECT THE WHITE WIRE TO THE CONTROL IF IT IS WIRED IN A
CIRCUIT THROUGH AN ELECTRIC DAMPER, OTHERWISE TRANSFORMER DAMAGE MAY RESULT.
TheWhitewirecontrolstheoptionalmotorizeddamperthatcanbeinstalledintoafreshair
duct.Thisdamperprovidestheabilitytocontrolfresh
airventilationusingtheventilationtimerfunctionof
theQuestDEH3000andtheterminallabeled“DMP”
(SeeSection3.8).Leavethe“DMP”terminalunusedif
amotorizeddamperisnotused,andcapofftheWhite
wirefromtheQuestdehumidier.
Standard wire colors for thermostats are as follows:
Description Color Terminal code
24VAC Red R
CallforHeat White WorW1
ForceFanOn Green G
Compressor
CallforCooling Yellow YorY1
2.3 Auxiliary Relay Operation
Itmaybedesirabletocoordinatefanoperationofthe
centralheating/coolingsystemwithdehumidierfan
operation.TheQuestDEH3000containsarelaythat
providesthisability.
TherelayterminalslabeledNC,COMandNOoperate
accordingtothefollowingchart:
FAN COM to NO COM to NC
ON CONNECTED OPEN
OFF OPEN CONNECTED
NO
COM
NC